diff --git a/src/main/java/de/dhbwstuttgart/inferWildcards/ConstraintsGenerationUtils.java b/src/main/java/de/dhbwstuttgart/inferWildcards/ConstraintsGenerationUtils.java
index 10b5c315..b1c35c15 100644
--- a/src/main/java/de/dhbwstuttgart/inferWildcards/ConstraintsGenerationUtils.java
+++ b/src/main/java/de/dhbwstuttgart/inferWildcards/ConstraintsGenerationUtils.java
@@ -1,6 +1,7 @@
 package de.dhbwstuttgart.inferWildcards;
 
 import java.util.HashSet;
+import java.util.Map;
 import java.util.Set;
 
 import de.dhbwstuttgart.parser.NullToken;
@@ -21,6 +22,16 @@ public final class ConstraintsGenerationUtils
 		throw new AssertionError("No ConstraintsGenerationUtils instance for you");
 	}
 
+	@SuppressWarnings("rawtypes")
+	public static ConstraintSet generateConstraints (Map<TypePlaceholder, RefType> tphMap) {
+		ConstraintSet constraintSet = new ConstraintSet<>();
+		tphMap.forEach( (tph, refType) -> {
+			ConstraintSet constraintSet2 = generateConstraints(refType, tph);
+			constraintSet.addAll(constraintSet2);
+		});
+		return constraintSet;
+	}
+
 	@SuppressWarnings({ "unchecked", "rawtypes" })
 	public static ConstraintSet generateConstraints (RefType refType, TypePlaceholder tph) {
 		ConstraintSet constraintSet = new ConstraintSet<>();
diff --git a/src/main/java/de/dhbwstuttgart/inferWildcards/ReplaceTypeparamVisitor.java b/src/main/java/de/dhbwstuttgart/inferWildcards/ReplaceTypeparamVisitor.java
index 808f9579..43e3a75b 100644
--- a/src/main/java/de/dhbwstuttgart/inferWildcards/ReplaceTypeparamVisitor.java
+++ b/src/main/java/de/dhbwstuttgart/inferWildcards/ReplaceTypeparamVisitor.java
@@ -1,6 +1,7 @@
 package de.dhbwstuttgart.inferWildcards;
 
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 import de.dhbwstuttgart.parser.NullToken;
@@ -13,7 +14,7 @@ public class ReplaceTypeparamVisitor
 	extends AbstractASTWalker
 {
 
-	private final Map<TypePlaceholder, RefTypeOrTPHOrWildcardOrGeneric> tphMap;
+	private final Map<TypePlaceholder, RefType> tphMap;
 	
 	public ReplaceTypeparamVisitor () {
 		this.tphMap = new HashMap<>();
@@ -23,7 +24,10 @@ public class ReplaceTypeparamVisitor
 	public void visit (RefType refType) {
 		if (!refType.getParaList().isEmpty()) {
 			System.out.println("Type: " + refType);
-			generateTypePlaceholder(refType);
+			List<RefTypeOrTPHOrWildcardOrGeneric> paraList = refType.getParaList();
+			paraList.stream().filter(e -> e instanceof RefType).map(RefType.class::cast)
+					.forEach(this::generateTypePlaceholder);
+
 		}
 		super.visit(refType);
 	}
@@ -34,7 +38,7 @@ public class ReplaceTypeparamVisitor
 		return tph;
 	}
 
-	public Map<TypePlaceholder, RefTypeOrTPHOrWildcardOrGeneric> getTphMap () {
+	public Map<TypePlaceholder, RefType> getTphMap () {
 		return tphMap;
 	}
 }
diff --git a/src/test/java/inferWildcards/TestInferWildcardsJavaTx.java b/src/test/java/inferWildcards/TestInferWildcardsJavaTx.java
index 8d66011f..bf631082 100644
--- a/src/test/java/inferWildcards/TestInferWildcardsJavaTx.java
+++ b/src/test/java/inferWildcards/TestInferWildcardsJavaTx.java
@@ -11,8 +11,11 @@ import org.junit.Before;
 import org.junit.Test;
 
 import de.dhbwstuttgart.core.JavaTXCompiler;
+import de.dhbwstuttgart.inferWildcards.ConstraintsGenerationUtils;
 import de.dhbwstuttgart.inferWildcards.ReplaceTypeparamVisitor;
 import de.dhbwstuttgart.syntaxtree.SourceFile;
+import de.dhbwstuttgart.syntaxtree.type.RefType;
+import de.dhbwstuttgart.syntaxtree.type.TypePlaceholder;
 import de.dhbwstuttgart.typeinference.constraints.ConstraintSet;
 import de.dhbwstuttgart.typeinference.constraints.Pair;
 
@@ -39,7 +42,13 @@ public class TestInferWildcardsJavaTx
 		Map<File, SourceFile> sourceFiles = javaTXCompiler.getSourceFiles();
 		ReplaceTypeparamVisitor visitor = new ReplaceTypeparamVisitor();
 		sourceFiles.entrySet().forEach(e -> e.getValue().accept(visitor));
-		System.out.println(visitor.getTphMap());
+
+		// Generate Constraints
+		Map<TypePlaceholder, RefType> tphMap = visitor.getTphMap();
+		System.out.println(tphMap);
+		ConstraintSet generatedConstraints = ConstraintsGenerationUtils.generateConstraints(tphMap);
+		System.out.println(generatedConstraints);
+
 
 		// Constraints
 		ConstraintSet<Pair> constraints = javaTXCompiler.getConstraints();